1145130985 has 12 divisors (see below), whose sum is σ = 1400591052. Its totient is φ = 898808768.

The previous prime is 1145130937. The next prime is 1145131003. The reversal of 1145130985 is 5890315411.

It can be written as a sum of positive squares in 6 ways, for example, as 187909264 + 957221721 = 13708^2 + 30939^2 .

It is not a de Polignac number, because 1145130985 - 2⁹ = 1145130473 is a prime.

It is a super-2 number, since 2×1145130985² = 2622649945614140450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26722 + ... + 54811.

It is an arithmetic number, because the mean of its divisors is an integer number (116715921).

Almost surely, 2^1145130985 is an apocalyptic number.

It is an amenable number.

1145130985 is a deficient number, since it is larger than the sum of its proper divisors (255460067).

1145130985 is an frugal number, since it uses more digits than its factorization.

1145130985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81644 (or 81591 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 1145130985 is about 33839.7840566396. The cubic root of 1145130985 is about 1046.2088480926.

It can be divided in two parts, 11451 and 30985, that added together give a square (42436 = 206²).

The spelling of 1145130985 in words is "one billion, one hundred forty-five million, one hundred thirty thousand, nine hundred eighty-five".